The glitch allows Minions to merge costumes. Imagine the firepower of the Dave-Trooper combined with the flight of the The Secret Sector:
If you are looking for the files, the Minion Rush Mega Mod Packs + Configs on Internet Archive serves as a central repository for these legacy version mods. If you'd like, I can help you: Find instructions on how to files. minion rush 570 mega mod work